Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cccda75fbcb9e27168fe8b2b56fabc5f6d56672f89dafc7203e8f117c5523f0' 
  AND token = 'ks5dCwf2WcjeZR1wkjpYoEPnrFzYyar98YcB53lGDIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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