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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24edb5c8fd7ca46ccbc27a3df200ed8a04720cfdee1a2e41addc556ceb6aac18' 
  AND token = '4UdOpuDVn+600vTa7YfuIWFs0PoaPG8PkNS2IEJxIFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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