Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdf834f3954b817347ed9568edf5c666bd06a6ffac40ee9a0beed209189a0f8d' 
  AND token = 'dEat7ibCtcO2vfS/mp+jTYLdffNjxNlYdtZr2FU6dO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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