Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a95f1dcc50ded341efab1d46480a55048aa281c80a3cc3d85e156f6276097f79' 
  AND token = 'I9mn6JWzHmmQLkA/XL80GKoJLKNNzNOp4UsZJ8JL6CI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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