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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23398fef91e3d4e7c61ebe261a9b091b309022de01552c3b754b0cc963b756cd' 
  AND token = 'LG0jH2uGovXS+i5UHTevQAWNnCFlv4ht2544LteQIl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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