Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d7eae2996a951592bb7199edce3fada611c033c23b1124f65cb0ffe75953220' 
  AND token = '7pCi11x7EBCPTZ22127UqXq86fhNt/+n3glVtbofKXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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