Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34da55eef27166d4ef4435431226424bdee703e176b55680c9a59280d0fe8940' 
  AND token = 'QSJRLqp9pUsAWAS6SeMbQmo0QZOFH/zJmuAe8RrVioM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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