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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '130bc04626c1d3ccf05a01ccb3a7dfe1ed41bcc5b54c4ed41db12095b79a2f84' 
  AND token = 'J0pGW7VuMyx8J4SQFJkjyq6imG9OEpZn7gU9ilP7Re0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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