SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63581ac6e8f3247756d9c9df08a761031d115786ab46924fb44205adc0fa19ad' 
  AND token = 'cllVqiF3oRCJXKj3Ks1PY7xTlIwKtJ2blf7hwjAsb3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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