SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '777db21f521e44097b8af625d05bd251bde7ea30aa1ac99b5590daf9149956fe' 
  AND token = 'BDf/8qvuxDY5Xg9t9VVLh8vtTyxc8W4wjG6mx5L7/k0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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