Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '614ddc6ac5c713964554c56469f571ab8123852e02b30086c2504f8b20d5b66c' 
  AND token = '46/TRyDVRR+ZlPXoFEcZW6/0Em9uy8KOj9gbcGw/5UM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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