Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8246773e4ef85a0c0727831220eae8c96a7c418f43c9c486f135032c5bdaed18' 
  AND token = 'YCD7aoynC/iTJBNkaq8LwsBgEDjWLr3OP3JUhCeffHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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