Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e25a664d0af1363d7bacdd6c919ebe083362fe7aab27751036c975cd9ba8ff79' 
  AND token = '44RDCeAW+zyEUDSuqvmB3THov72u2zLyXg9WCQi+a5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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