Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b9b079c17db3c01e0ec282e13cfaef0935f2df329ad25824ef5c6dbec7c43bf' 
  AND token = 'G167FnI7z50J3T1Zn/cH2v18UwY/G9N7vj9kceP12u4=' 
  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"
    }
  }
}