Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '569ef5dc8e34241eb2a41b4ef5beb152a2a15b7287e5a3dd271f742f829b94fd' 
  AND token = 'oK8M62MM1VsNJ4Q+0G4E5qiZUz6JNHi3Hcdtn+URsBA=' 
  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"
    }
  }
}