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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1560af2ed9c7de1a7047b8f96305b3874394be5b64943bbea51160aabbf004d' 
  AND token = 'AqY05LmVfBBsp7qIIRxxgZUMdO60uq/z8X3ZE23UWBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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