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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07c10405b128bb6c9484769da7e39c5a8f4fdfe9895d299237f9890cc9e68ce5' 
  AND token = 'Bu7FDx1gXwdNOckttpxsIUdDKzQu4L84tA7Nq00q7os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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