Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af466e37e3bd2b604dac0c27dc3df373286749d45027bc463e8177196a5efb00' 
  AND token = 'RoLUs7ahhfW9DbjPDM79fpSpdTRGK2ilt0aX8rnBFec=' 
  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"
    }
  }
}