Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '685226b786f38179b2c849a5f34e363dce5fa44eced428420f3c5dd102dbbb32' 
  AND token = 'LJmKb4SjfCR6lCHbsBUVfViuA7QN52gIX83+qRrUf4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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