Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94dbd9c881819fd5817e65b6dcd326238c4bf1712817d13b59866b96bde39040' 
  AND token = 's9Nuxz+ncOT3Mnmo5YY0+o8at+GXOrnlvwngqdFj2bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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