Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76c19516d87df9303c94cbe2f5c1ee051298fe044b2cef80e0a243b62c809778' 
  AND token = 'qRLDu9jsp6h8j1t+6bylseYgxTyEqeauot8anR4V4Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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