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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab0705f5dee2b9419749ca4edd3003bb3c6f371b9692dbdec85b70559ea39cad' 
  AND token = 'ccd6f9vw75dF2HE8DRKN3LtJJUBDYtoyIHIB6IC+qa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}