Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20b5cc8b6922978533605626552dc18abb29400df76d5030d63cfcf6e13b8215' 
  AND token = 'R520KxPCVshsC8NRxDe9Z3VGlODQVl9qop8uQdlxipc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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