Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '790725d636b51953f61b6debc2f77cf97861087875e686225ff1a2521747d0a7' 
  AND token = '2/n3CtaEZikeHXlyHRd8BLJZQ7S051EkODU0ojyz+P0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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