Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f45f433ea2745349cb302b436588340752b00f4c891ea681bedaee8d0ef3215d' 
  AND token = 'PIlWK5RNp1OI+531DFbq1CbJjZT0psaJZ7S3vb427EE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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