Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd011bfbb7fea5adc21624c3e78246ad186b507360512dcb11c6688a9674b1cee' 
  AND token = 'FXmmZNBz6bnkAYfN6P4SLQpPEnI8l+qrh9nMNPsX3+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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