SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7bfd694fd0542847b105da19cffdc266c8ec8f90c0809ae80b25d5513b8ebb76' 
  AND token = '1TCQUNzxGga8BNmkzzdMkH0wnxdqhOHstRgJKoXiee8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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