Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5618b67b4fc154a285e59459ba0f6b0feca8ab3d941c4f0c85401c702823ec89' 
  AND token = '+w1fDKIOJRGpPO4nq3PKQLyuC91XSlc4aR8qTMjxzJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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