Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efc99118f05fd076c07aa88655f8d4ecb0e79ec68f76917af1a05c20ec0e605a' 
  AND token = 'TgdSRSRBwJGg1XIKa/Pgmf1zB9I6UgQIKRNR1Nv6h9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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