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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3572a59260dc2fd397ac55e60ad889c376a4d74f785760ac56f39c5715160eba' 
  AND token = 'n7pbBylT7rAKDpYlml4AVvzBMdr6ya1uvWCoW38eHrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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