Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5475eb65a84af66b1627d46a37a586a2eb3483c84229cdf83ba2ccc1a5b27522' 
  AND token = 'rpbWu+///Tbx1uMR7oDS0csJ2K2WIlpyclaWPgL0vrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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