Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59f1319ca36cd1d1fe20c0206dc52b6e15c3e26c089a1e370e5514c42a5d44a8' 
  AND token = 'gBx68vQp5lmuBTgF67LLMvmeGDqHm4dXE4kMEOSL+tY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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