Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66140bc3e71c0cdec9207753f5f4bec77d5aae39c1cf3801e37e89d8b51f73c4' 
  AND token = 'yZT82wmXrOo9Veavi+edukUXNDemsPnsVAANVPNxspE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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