Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb3315098f78994077e3af9a740b440ebe93de3421c9803dae639e798bc84d6f' 
  AND token = 'aV97lt8+rj2NnBmQBvoyHzhttWAEHUoFPPaUQZptQA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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