Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0058e4f3824b38b8ecc770c9783a823e8da2d78692777d4515b77f69dc769cf3' 
  AND token = 'D462SaljONqqWhMu6k63KKKmcUmnWuMIesmZ+z9S/Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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