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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffa3c853771eeb8f1c2d3a6e8d02cc3ec6b37d86cf44e5b569adf1aca7cbb813' 
  AND token = 'tJZpIpcvNAAKOomykoqhgsqLNv+y437wJFSbD8SsRB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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