Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '466e96b64b398e744a0a6222736f06d85c1f29c215353eb04a2bd99dd0346b14' 
  AND token = 'K/9jrjhNKpsSwyge4Xk8PR2jv7gLB0SUbnT7a0FZhrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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