Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f611997902756a19161e161bc6a666d756ddb6bdda430ad3b6fac1fee060170' 
  AND token = '5QQv+iZGYMNk0rRxcNcTh0LUU22oaAObROvFAIAC3hM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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