Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8d6129a92a0a82c36126815de278c0c154ff5997c100f7b34f17df13de7aadb' 
  AND token = 'QSZ5oO2njLiHNCHwdLdxshJCKx7iNH9GMLWBbt3a33U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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