Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b0b9fe5e68d83fe9b04023896e6fc3ea690a7c465f6d4ab530357747ca0ebb1' 
  AND token = 'dWLrHeT5RF+VOJBaDPpMVTEO9Z5MVTUjlYpQ2gHba2g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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