Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4175e0e2839d5978273916a1aa5b096b6172d1fa2eb5cebfa5969a6ac0772885' 
  AND token = 'ZNo/IA/XWB5D+3/MMpTc7FgQssqTElpc37XCANWm9Po=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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