Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '331514850044e376bea069cf6c196113030434e3178c729773d83b34e19827d1' 
  AND token = 'hUxxiiiU6InMbr8ZOaYZCrscziKgwM/GIgihxr6nlXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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