Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f145b07ac5042d74cbf18f0976e8ea3e8a766d7d9ae35e8f35fb647cb0cb8650' 
  AND token = 'VEGHnVuu50/L0Hm1zImJV/cPwgydLPvKgRg8fj3b/a8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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