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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0667098152aefa95b66678c40a3651f96fb22c4120b6c25886824c1c89139999' 
  AND token = 'bK2zNxc78vQ+Equ93HpM52MBvDrIUNzWNo3AXpxG2F8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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