Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a1b04128d33afd0ecb105052ff82cae4fbecffe5eb0227fb8e6618f9a9d2dff' 
  AND token = 'qmTWxEtxv84sUk5BCDL8uCczo1M0YLaw+H/43X3LM38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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