Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bb2fc29fd51d83f42f6f20d563642efafb16c554f5776750726dea07518850d' 
  AND token = 'Xq2hPmzbxwIGGo8tMbUK7BceU4MCbqlpyn8qldjxGG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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