Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '614fc122338288edcecbac5a336d129822e58db218081c704cdc3814db7e4416' 
  AND token = 'SvbQonQu7d/S/EbhuGE2tuRn92VAp3AzLjETrcJWi2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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