Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40e7a47de6b80c6e23a494a4dd9086b774dcb7c162786979610bfaa216a72866' 
  AND token = 'CL4nEthGHEUCefWx7W9nbNAu5jnxcVKcooBygcH3fck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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