Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c00575e27b93f6894d506508a2e6ae2d6d6dca2ca610cd556a50fc08914db85' 
  AND token = 'A6UsKAGUGL3DWz1tFtj3iThhu3QxsDoT9mztKE/eBUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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