Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '042c09ae1b841fdcb1a039252174409ea4121630e1691b1b32fdfeb390a38752' 
  AND token = 'BEtNZ+0wK7jJYhD03KDipuBZ6LvmEueMzU49hr4kCZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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