Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a740822b0e395766787792c7372ec65c44d1f6a665edd586abdf8285ff34696a' 
  AND token = 'k4I1b1CyUd2k18SMybiesjrpj6oWF6B7Cx8r2WRg9Yg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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