Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9aad66288ff192cef869f818156678a30f5cf767c4e720a266e2db4d5d6411af' 
  AND token = 'eGSdFVX6aB7JwYzZC7BjtMo4GiMHZbPYw5vFAr1U0jk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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