Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '554e72beca7b089a04af5f3a5b7a256781d61d20410ff7b2e39d0a6bd519014f' 
  AND token = 'Dw7J8Gj58ujarBEbxXOngqL4SdZhEpROrpmkXdbkE98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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