Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20040d983bfd0d0cf087980f335da948eca8546d5de932ee289c9e81a99e6142' 
  AND token = 'YyAVGEDNf3yC4JayCS8Qx0vPrzuoqWRHQb8ROqOcFuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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