Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c46fea04f3c2ff81ec2d807b0c286bc97aefb40a4546450562d48bad5dd1e84' 
  AND token = 'Q9XAILjCY8kygE6hsY2CdfyVDc5FDPPV9iIM5Igh+AA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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