Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cbf01de34f2fac0ab05b672ffed5decbad67e89815f2b4550c0f5e667f361f8' 
  AND token = '730AsQmnfEeVw8NpOV+b5EW58JshW/CkKQ/QvBh2SNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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