Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c5566a4363f1aa4b1623867766654e541fe1254470b01f2803504683cacac95' 
  AND token = 'aVdeAqPFLY9EpZmdzu790kZAb1hcFiQTLlsDSFT1SyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}