Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e33c99562b8b42aa58f31cd2d5f5941948b8b35aaef6c251422b1fc14570480' 
  AND token = 'fHnMT83hy7KdTt8Aqm0Y9Sj49NuW43wjzI0ol5YpPBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}