Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '336bec2f0051e30cb7a6e30088ec6efe9176c627d2619c17ac9f3260b2dcb6c6' 
  AND token = '+1ZvuRuQk1qcslsQW1NgMMHG5YpyikoNOT9xZH/vUx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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