Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d11eda155a7b39645c3f79a6d8dbde0bc425671022a5ef56327ae2401c2c8b6' 
  AND token = 'mDniGPb+a2Bi/APg3BbBuvcwNVMz85NeQa4SfMqNrJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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