Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41e3ac87381fe5fa4e96d0c2583ca38c13880252b615cb46015c3e69145a967f' 
  AND token = 'GrSptBHQRWJI9UTKOEdnWPLWMKiJmn2eRktDRB9MjEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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