Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c29f1a17af0fbfc37bd375fa92219ace7798453edabcbebe4463323f6d503eb' 
  AND token = '37oMhOUhbH1dCvb+Jv6ww3ZPhb8vNHDiM967OOJkXRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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