SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd41b1e338cf7b7694fd84551d23f99d5c3f9e8ae107a25e8ab60df53c2b74ef3' 
  AND token = 'sc/HgiMESHFOXbGM1CHpZO5ZVqGw/wIQUC0MR/Cx+5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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