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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34801a90e5cb304880c97dc829c3c53d0faf2fb00ccb8ac8cacee1ceb83b0d31' 
  AND token = 'wRkbIwmSE+43O/W5Ynyu14RLfIqj7SrATiLhasm0ijU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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