Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '548fe6556220a348ae48b5781172a8f78c34005c235b160d28e2b12fd8d22727' 
  AND token = 'Ju3Ri/F0xo336UArZDpUgS/aEqE/rYk+rcIf3oGoNHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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