Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3796ad026ff1799ede29ecadca41e9fc9439b92ba3a1c796d7943f1e38e6c50e' 
  AND token = '5ksRl70ZhtOG4+0/3/MdvdekQbjiVfjV70Kr/m6eMv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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