Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaddc34ff09f00a97377b48e4103eec376c8c2e0ce4b96bdaa45ab2ce0236875' 
  AND token = '0MaF33rL6ssp+c2JP0QZI8f4jqv5fZxD2seoyiG74fE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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