Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a2831f5ab5a8070b2ef645746ed686b8afa2acd4efcd62262dd0f0d41462251' 
  AND token = 'OVqSfMYEkkVTwM1CWnPzmot7zt1t1+LmY9pMyWTKmXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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