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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60b2d17a38866ff1b44c35f2fe8aa7b5ad86103721f28fdb12b9c55dcc0f1480' 
  AND token = 'qe9sgd6qnW6ntLmBSka7OosUK8ICopTwHjkiEAIqK1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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