Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8f289c9b3922b4d4d016b1f6fecbbb0d846820f7e87f1610f77c491a9870559' 
  AND token = 'W25JrgrDV99aCPshJCGJl9ZAVrAlAksYfZN91EPXIvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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