Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2b37640817bf790e3756d3af6e96d375e92ff7cbfa5f9cafc54d27d178ca786' 
  AND token = 'IKyknR21hzaL4V4EDVImnGa3gDDnps8DS/qDGvI2Vhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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