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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36e24294c9bd0536b8aee5ae8b622c9681d6db58b4225856ba5001074a4e9f60' 
  AND token = 'EWPHlrvrzLjtH1jh5P1y71sK8mgRaiIcC1QyyeD8L7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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