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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0949868afb626e05604c2bcf74da603b4b8024afa6ba2b77194734090d227c01' 
  AND token = 'Gn69zuT9C6NRmCCNTyqGX1PlMUJ6N4Jl5JRhuQhD+qg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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