SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06a3d267619f463125c3f00f9fac4c65316b4051c2b8355908d0e640b74ada68' 
  AND token = '7ZKVo3GxZpSGiOYUgTK32ZblfYQW/uY3ELFM9lB6ILY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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