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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7b6655d4fd482a306addf8a71a4581c9df5b917536b50fc9c7cc90e10dca76b' 
  AND token = 'rwnRVJ5baT5Bu/V8SLvf0ts/J10KTTndUIkLd4qhdLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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