Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '350d6ffbd14cb688cdcbb6a4a8d6b43f58b744cd272bb88ecd9b12fcdffbdfe2' 
  AND token = 'pKwN2rZc8bL0utackksqOfBc45wS4dJb/SsJnkLx3+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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