SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'eeb46f4a1549f8b8149199ab59a3c93661d80a7a2af721fed2f2d80b41f06228' 
  AND token = 'lbwtU4pQPWROM7boCSdOuR+/7kDjTVnSXIKC0VJmj1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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