Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b069964e86de8abf2bd7cf847c6aaae4a31aa374cbc34d42a93943853742e54' 
  AND token = 'i69ipdRPeA2wwhbV3ZPlxWS731HRBQyixXlz6RTQC8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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