SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '42a14fe5a0e9110854519c79fae1fa435ad994c8778b61ea38afeaaefb66d983' 
  AND token = 'yo+YqdMZpvsw406Q0WUgUod7rx5pVPB6jc2B2jPf6kY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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