Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98b1962187828cde9bc3336c0fffc0162e9c576da47a7a086720ddbe019931e4' 
  AND token = 'gW/c+EKWSz3YZDqs/H3W+8ocOJ9Z8y/lRandzq56GPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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