Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ea260036225717c10825ef099a882f452012900434fd13fbe0dbf1a82a904c0' 
  AND token = 'T7M0npU70ZBCLhSvU2aEYad2sfiyzWCPZMga2oIsNxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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