Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7416419bd57ae49f8166d840e8f27d59c36e7744ef3e75021f344a87ac7a93d3' 
  AND token = 'VFb21OaFvn1mAppgg1NsnPefh/QCo2UNESORtlcPn5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}