Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37efc3f7cf182fd316a1e2318b046ecb214681d429af1f6a0b2d840492f0c55f' 
  AND token = '5ZAWa0xECw2IPNyt2txO8tWKrlgQTjVH1kdoU/PARE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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