Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ebf1dc9f51069cdc6a10629b883a158ad6083743c46498a6335ecee2fba8ca5' 
  AND token = 'xb79NC9NTgycUwg1ffAXIdvYC9UdOtR+JXGXXTntLxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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