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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed4f2852aea6fd6d444f3ba4ca903db14e94ef2d36446111dfb58a2fc3657f27' 
  AND token = 'YCC/f837Nd24E5+HuXPuautEQml+X8qkioeKMyQB+4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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