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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84f5625778c0507941f6fa930443e8c343a128c034a45d574af700d8547379e4' 
  AND token = 'ezb5Q3DHgC78tWCVl8bb9zOJTlBArBUO/M8wBhoRyBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}