Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'babf979a16c84b6053d607a7a65e949374a5d82e6672ff10478d368d4613caf0' 
  AND token = 'SYS3OAxFt6pentB7nAJecHLB9q3uEhG45Whe2yNFEBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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