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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18a4dffb2ec36d0e349d97c02ffc3906ea1a6fdb0e5334a4c3ffeb8831363ac9' 
  AND token = 'yecBklVK+gVyQUpmcdLkvpIJ/ZdALJtd9ag8YGA3enA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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