Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb5093fe123cedd5e83f2e1976f961b69435939b838dd4f0053fff7111a7657' 
  AND token = 'dFg1uWjlpZ/WmdFw9pA7dYOzxKk3XlTTNSToH78Virc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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