Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29738ad8a62b4f70b15e4b3cb16b41c80537b9c2400b4921ae38e67bae819a49' 
  AND token = 'oYovcotQ6x4fXNKDXwmLmRjeV9i5qhNznrnthk0hwTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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