Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37c86d430bbedfc3dfbcd1be2c1ed5061ddf3374b0d30dc1b9838961baa7ec18' 
  AND token = 'a1KCJP+ktMN+zcbgjkJ109Wks/Jk4+080//EFKp5+ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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