Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8c03cc1efddf0ecaecdab86a77af2b55a68cbe5d49b08a646e8da598b672c2f' 
  AND token = 'FHWXQroTuwJWDXJmnF4vA/U+hhdKTFDnV7mXZV57wFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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