Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88829105b55016a93e613de4c2273f0ef312909e181aaab146f39d953fee0105' 
  AND token = '8qTevt9ICKOOuECxi6EShJe2If8RnY4J1s8oozA/fBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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