Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9000c3a2462563d643a5ab30742021c1ff02a9a0f081a91474dfbadc52007fef' 
  AND token = 'BqHfD2LbeCEj0qlsQ2tp60ygyW/YkdYNstc6szofrOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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