Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98326fcf8a02b1879cdf4ca40e970b97fe4ff440c9a0dac3e75a84365d19e099' 
  AND token = 'Pq6tV1PTYmNty8RB8NbSTsVhFAoV1Vy/bWFE4+XduFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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