Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a09f0fb0b01ae43588922f03fd566ebcb0458b90befd507fdad9a3760cf3fbad' 
  AND token = '38jBEOFneyp9nyDSYCfIBw/rmBxevIq7Rh0Xg0gzEfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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