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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26d7e8b74a318d7dc5e0286b1203cacfe85044abd31f87164d5b9e79a7de5d10' 
  AND token = 'mp5JiyQQf65uUdWmehPCE5gTfMqktkLyddE6R1QvzdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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