Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6e787524494d5eb208baa88e32d746cbc2eb1eb7b716f715573d2f67236d6c1' 
  AND token = 'TGAVnt6LebkO4fm878gUxEL+PQSxD20FoJSs722bDLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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