SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bfc8fdb6de6713c0e7aa7b8942c48549c9f504096a86142ae13d462b33cf7f29' 
  AND token = 'HPML/rWxXU0s1Fb9wkQeufz4LVplm4mvoPhgkAZIIQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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