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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '386d5c47bed125973c4ec38ca49935ebf67e189db76c0809de1a3c899f6b3c38' 
  AND token = 'wOAPPYcDgO21zPUXJ7iBYanccIoWjQ3oHeVToJlKu9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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