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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '907dc060773d39913d899b4a378bd3d16908039dd315f52e5239439710734267' 
  AND token = 'rorrNH+vIIB6BG7Ut7OboYjX0G+a8AolnXPdDDfc+Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}