Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4ac37d94337fe5726fe50995849f2be5da953b51bb0d818da1d8017a4a96db8c' 
  AND token = '0L2AeFv3zuZygNluBgb0nu7APYe4YaRJbXdv3wsuH88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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